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3 cijfers X 3 cijfers met hulp [1]

3 cijfers X 3 cijfers met hulp [1]

 
1 3 0
1 6 7 ×
7 × 0 = 0
7 × 30 = 2 1 0
7 × 100 = 7 0 0
60 × 0 = 0
60 × 30 = 1 8 0 0
60 × 100 = 6 0 0 0
100 × 0 =
0
100 × 30 =
3000
100 × 100 =
+ 10000
21710